[unix-history] / usr / src / sbin / fsck / inode.c

#ifndef lint
static char version[] = "@(#)inode.c	3.10 (Berkeley) %G%";
#endif

#include <pwd.h>
#include <sys/param.h>
#include <sys/inode.h>
#include <sys/fs.h>
#include <sys/dir.h>
#include "fsck.h"

ckinode(dp, idesc)
	DINODE *dp;
	register struct inodesc *idesc;
{
	register daddr_t *ap;
	int ret, n, ndb, offset;
	DINODE dino;

	idesc->id_fix = DONTKNOW;
	idesc->id_entryno = 0;
	idesc->id_filesize = dp->di_size;
	if (SPECIAL(dp))
		return (KEEPON);
	dino = *dp;
	ndb = howmany(dino.di_size, sblock.fs_bsize);
	for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
		if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0)
			idesc->id_numfrags =
				numfrags(&sblock, fragroundup(&sblock, offset));
		else
			idesc->id_numfrags = sblock.fs_frag;
		if (*ap == 0)
			continue;
		idesc->id_blkno = *ap;
		if (idesc->id_type == ADDR)
			ret = (*idesc->id_func)(idesc);
		else
			ret = dirscan(idesc);
		if (ret & STOP)
			return (ret);
	}
	idesc->id_numfrags = sblock.fs_frag;
	for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
		if (*ap) {
			idesc->id_blkno = *ap;
			ret = iblock(idesc, n,
				dino.di_size - sblock.fs_bsize * NDADDR);
			if (ret & STOP)
				return (ret);
		}
	}
	return (KEEPON);
}

iblock(idesc, ilevel, isize)
	struct inodesc *idesc;
	register ilevel;
	long isize;
{
	register daddr_t *ap;
	register daddr_t *aplim;
	int i, n, (*func)(), nif, sizepb;
	BUFAREA ib;
	extern int pass1check();

	if (idesc->id_type == ADDR) {
		func = idesc->id_func;
		if (((n = (*func)(idesc)) & KEEPON) == 0)
			return (n);
	} else
		func = dirscan;
	if (outrange(idesc->id_blkno, idesc->id_numfrags)) /* protect thyself */
		return (SKIP);
	initbarea(&ib);
	if (getblk(&ib, idesc->id_blkno, sblock.fs_bsize) == NULL)
		return (SKIP);
	ilevel--;
	for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
		sizepb *= NINDIR(&sblock);
	nif = isize / sizepb + 1;
	if (nif > NINDIR(&sblock))
		nif = NINDIR(&sblock);
	if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
		aplim = &ib.b_un.b_indir[NINDIR(&sblock)];
		for (ap = &ib.b_un.b_indir[nif]; ap < aplim; ap++) {
			if (*ap == 0)
				continue;
			if (dofix(idesc, "PARTIALLY TRUNCATED INODE")) {
				*ap = 0;
				dirty(&ib);
			}
		}
		flush(&dfile, &ib);
	}
	aplim = &ib.b_un.b_indir[nif];
	for (ap = ib.b_un.b_indir, i = 1; ap < aplim; ap++, i++)
		if (*ap) {
			idesc->id_blkno = *ap;
			if (ilevel > 0)
				n = iblock(idesc, ilevel, isize - i * sizepb);
			else
				n = (*func)(idesc);
			if (n & STOP)
				return (n);
		}
	return (KEEPON);
}

outrange(blk, cnt)
	daddr_t blk;
	int cnt;
{
	register int c;

	if ((unsigned)(blk+cnt) > fmax)
		return (1);
	c = dtog(&sblock, blk);
	if (blk < cgdmin(&sblock, c)) {
		if ((blk+cnt) > cgsblock(&sblock, c)) {
			if (debug) {
				printf("blk %d < cgdmin %d;",
				    blk, cgdmin(&sblock, c));
				printf(" blk+cnt %d > cgsbase %d\n",
				    blk+cnt, cgsblock(&sblock, c));
			}
			return (1);
		}
	} else {
		if ((blk+cnt) > cgbase(&sblock, c+1)) {
			if (debug)  {
				printf("blk %d >= cgdmin %d;",
				    blk, cgdmin(&sblock, c));
				printf(" blk+cnt %d > sblock.fs_fpg %d\n",
				    blk+cnt, sblock.fs_fpg);
			}
			return (1);
		}
	}
	return (0);
}

DINODE *
ginode(inumber)
	ino_t inumber;
{
	daddr_t iblk;
	static ino_t startinum = 0;	/* blk num of first in raw area */


	if (inumber < ROOTINO || inumber > imax)
		errexit("bad inode number %d to ginode\n", inumber);
	if (startinum == 0 ||
	    inumber < startinum || inumber >= startinum + INOPB(&sblock)) {
		iblk = itod(&sblock, inumber);
		if (getblk(&inoblk, iblk, sblock.fs_bsize) == NULL) {
			return (NULL);
		}
		startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
	}
	return (&inoblk.b_un.b_dinode[inumber % INOPB(&sblock)]);
}

clri(idesc, s, flg)
	register struct inodesc *idesc;
	char *s;
	int flg;
{
	register DINODE *dp;

	dp = ginode(idesc->id_number);
	if (flg == 1) {
		pwarn("%s %s", s, DIRCT(dp) ? "DIR" : "FILE");
		pinode(idesc->id_number);
	}
	if (preen || reply("CLEAR") == 1) {
		if (preen)
			printf(" (CLEARED)\n");
		n_files--;
		(void)ckinode(dp, idesc);
		zapino(dp);
		statemap[idesc->id_number] = USTATE;
		inodirty();
	}
}

findname(idesc)
	struct inodesc *idesc;
{
	register DIRECT *dirp = idesc->id_dirp;

	if (dirp->d_ino != idesc->id_parent)
		return (KEEPON);
	bcopy(dirp->d_name, idesc->id_name, dirp->d_namlen + 1);
	return (STOP);
}

findino(idesc)
	struct inodesc *idesc;
{
	register DIRECT *dirp = idesc->id_dirp;

	if (dirp->d_ino == 0)
		return (KEEPON);
	if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
	    dirp->d_ino >= ROOTINO && dirp->d_ino <= imax) {
		idesc->id_parent = dirp->d_ino;
		return (STOP);
	}
	return (KEEPON);
}

pinode(ino)
	ino_t ino;
{
	register DINODE *dp;
	register char *p;
	struct passwd *pw;
	char *ctime();

	printf(" I=%u ", ino);
	if (ino < ROOTINO || ino > imax)
		return;
	dp = ginode(ino);
	printf(" OWNER=");
	if ((pw = getpwuid((int)dp->di_uid)) != 0)
		printf("%s ", pw->pw_name);
	else
		printf("%d ", dp->di_uid);
	printf("MODE=%o\n", dp->di_mode);
	if (preen)
		printf("%s: ", devname);
	printf("SIZE=%ld ", dp->di_size);
	p = ctime(&dp->di_mtime);
	printf("MTIME=%12.12s %4.4s ", p+4, p+20);
}

blkerr(ino, s, blk)
	ino_t ino;
	char *s;
	daddr_t blk;
{

	pfatal("%ld %s I=%u", blk, s, ino);
	printf("\n");
	switch (statemap[ino]) {

	case FSTATE:
		statemap[ino] = FCLEAR;
		return;

	case DSTATE:
		statemap[ino] = DCLEAR;
		return;

	case FCLEAR:
	case DCLEAR:
		return;

	default:
		errexit("BAD STATE %d TO BLKERR", statemap[ino]);
		/* NOTREACHED */
	}
}

/*
 * allocate an unused inode
 */
ino_t
allocino(request, type)
	ino_t request;
	int type;
{
	register ino_t ino;
	register DINODE *dp;

	if (request == 0)
		request = ROOTINO;
	else if (statemap[request] != USTATE)
		return (0);
	for (ino = request; ino < imax; ino++)
		if (statemap[ino] == USTATE)
			break;
	if (ino == imax)
		return (0);
	switch (type & IFMT) {
	case IFDIR:
		statemap[ino] = DSTATE;
		break;
	case IFREG:
	case IFLNK:
		statemap[ino] = FSTATE;
		break;
	default:
		return (0);
	}
	dp = ginode(ino);
	dp->di_db[0] = allocblk(1);
	if (dp->di_db[0] == 0) {
		statemap[ino] = USTATE;
		return (0);
	}
	dp->di_mode = type;
	time(&dp->di_atime);
	dp->di_mtime = dp->di_ctime = dp->di_atime;
	dp->di_size = sblock.fs_fsize;
	dp->di_blocks = btodb(sblock.fs_fsize);
	n_files++;
	inodirty();
	return (ino);
}

/*
 * deallocate an inode
 */
freeino(ino)
	ino_t ino;
{
	struct inodesc idesc;
	extern int pass4check();
	DINODE *dp;

	bzero((char *)&idesc, sizeof(struct inodesc));
	idesc.id_type = ADDR;
	idesc.id_func = pass4check;
	idesc.id_number = ino;
	dp = ginode(ino);
	(void)ckinode(dp, &idesc);
	zapino(dp);
	inodirty();
	statemap[ino] = USTATE;
	n_files--;
}
Commit	Line	Data
7026cd3f	1	#ifndef lint
1ccd95ec	2	static char version[] = "@(#)inode.c 3.10 (Berkeley) %G%";
7026cd3f KM	3	#endif
7026cd3f KM	4
1ccd95ec	5	#include <pwd.h>
7026cd3f KM	6	#include <sys/param.h>
	7	#include <sys/inode.h>
	8	#include <sys/fs.h>
	9	#include <sys/dir.h>
	10	#include "fsck.h"
	11
	12	ckinode(dp, idesc)
	13	DINODE *dp;
	14	register struct inodesc *idesc;
	15	{
	16	register daddr_t *ap;
	17	int ret, n, ndb, offset;
	18	DINODE dino;
	19
7026cd3f KM	20	idesc->id_fix = DONTKNOW;
7026cd3f KM	21	idesc->id_entryno = 0;
f0ed004a	22	idesc->id_filesize = dp->di_size;
f8a97eea KM	23	if (SPECIAL(dp))
	24	return (KEEPON);
	25	dino = *dp;
7026cd3f KM	26	ndb = howmany(dino.di_size, sblock.fs_bsize);
	27	for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
	28	if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0)
	29	idesc->id_numfrags =
	30	numfrags(&sblock, fragroundup(&sblock, offset));
	31	else
	32	idesc->id_numfrags = sblock.fs_frag;
	33	if (*ap == 0)
	34	continue;
	35	idesc->id_blkno = *ap;
	36	if (idesc->id_type == ADDR)
	37	ret = (*idesc->id_func)(idesc);
	38	else
	39	ret = dirscan(idesc);
	40	if (ret & STOP)
	41	return (ret);
	42	}
	43	idesc->id_numfrags = sblock.fs_frag;
7718c0e6	44	for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
7026cd3f KM	45	if (*ap) {
	46	idesc->id_blkno = *ap;
	47	ret = iblock(idesc, n,
	48	dino.di_size - sblock.fs_bsize * NDADDR);
	49	if (ret & STOP)
	50	return (ret);
	51	}
	52	}
	53	return (KEEPON);
	54	}
	55
	56	iblock(idesc, ilevel, isize)
	57	struct inodesc *idesc;
	58	register ilevel;
	59	long isize;
	60	{
	61	register daddr_t *ap;
	62	register daddr_t *aplim;
7718c0e6	63	int i, n, (*func)(), nif, sizepb;
7026cd3f	64	BUFAREA ib;
48a66bfb	65	extern int pass1check();
7026cd3f KM	66
	67	if (idesc->id_type == ADDR) {
	68	func = idesc->id_func;
	69	if (((n = (*func)(idesc)) & KEEPON) == 0)
	70	return (n);
	71	} else
	72	func = dirscan;
	73	if (outrange(idesc->id_blkno, idesc->id_numfrags)) /* protect thyself */
	74	return (SKIP);
	75	initbarea(&ib);
	76	if (getblk(&ib, idesc->id_blkno, sblock.fs_bsize) == NULL)
	77	return (SKIP);
	78	ilevel--;
7718c0e6 KM	79	for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
	80	sizepb *= NINDIR(&sblock);
	81	nif = isize / sizepb + 1;
7026cd3f KM	82	if (nif > NINDIR(&sblock))
7026cd3f KM	83	nif = NINDIR(&sblock);
48a66bfb KM	84	if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
	85	aplim = &ib.b_un.b_indir[NINDIR(&sblock)];
	86	for (ap = &ib.b_un.b_indir[nif]; ap < aplim; ap++) {
	87	if (*ap == 0)
	88	continue;
	89	if (dofix(idesc, "PARTIALLY TRUNCATED INODE")) {
	90	*ap = 0;
	91	dirty(&ib);
	92	}
	93	}
	94	flush(&dfile, &ib);
	95	}
7026cd3f KM	96	aplim = &ib.b_un.b_indir[nif];
	97	for (ap = ib.b_un.b_indir, i = 1; ap < aplim; ap++, i++)
	98	if (*ap) {
	99	idesc->id_blkno = *ap;
	100	if (ilevel > 0)
7718c0e6	101	n = iblock(idesc, ilevel, isize - i * sizepb);
7026cd3f KM	102	else
	103	n = (*func)(idesc);
	104	if (n & STOP)
	105	return (n);
	106	}
	107	return (KEEPON);
	108	}
	109
	110	outrange(blk, cnt)
	111	daddr_t blk;
	112	int cnt;
	113	{
	114	register int c;
	115
	116	if ((unsigned)(blk+cnt) > fmax)
	117	return (1);
	118	c = dtog(&sblock, blk);
	119	if (blk < cgdmin(&sblock, c)) {
	120	if ((blk+cnt) > cgsblock(&sblock, c)) {
	121	if (debug) {
	122	printf("blk %d < cgdmin %d;",
	123	blk, cgdmin(&sblock, c));
	124	printf(" blk+cnt %d > cgsbase %d\n",
	125	blk+cnt, cgsblock(&sblock, c));
	126	}
	127	return (1);
	128	}
	129	} else {
	130	if ((blk+cnt) > cgbase(&sblock, c+1)) {
	131	if (debug) {
	132	printf("blk %d >= cgdmin %d;",
	133	blk, cgdmin(&sblock, c));
	134	printf(" blk+cnt %d > sblock.fs_fpg %d\n",
	135	blk+cnt, sblock.fs_fpg);
	136	}
	137	return (1);
	138	}
	139	}
	140	return (0);
	141	}
	142
	143	DINODE *
	144	ginode(inumber)
	145	ino_t inumber;
	146	{
	147	daddr_t iblk;
	148	static ino_t startinum = 0; /* blk num of first in raw area */
	149
	150
39c18287 KM	151	if (inumber < ROOTINO \|\| inumber > imax)
39c18287 KM	152	errexit("bad inode number %d to ginode\n", inumber);
7026cd3f KM	153	if (startinum == 0 \|\|
	154	inumber < startinum \|\| inumber >= startinum + INOPB(&sblock)) {
	155	iblk = itod(&sblock, inumber);
	156	if (getblk(&inoblk, iblk, sblock.fs_bsize) == NULL) {
	157	return (NULL);
	158	}
	159	startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
	160	}
	161	return (&inoblk.b_un.b_dinode[inumber % INOPB(&sblock)]);
	162	}
	163
	164	clri(idesc, s, flg)
	165	register struct inodesc *idesc;
	166	char *s;
	167	int flg;
	168	{
	169	register DINODE *dp;
	170
39c18287	171	dp = ginode(idesc->id_number);
7026cd3f	172	if (flg == 1) {
7718c0e6	173	pwarn("%s %s", s, DIRCT(dp) ? "DIR" : "FILE");
7026cd3f KM	174	pinode(idesc->id_number);
	175	}
	176	if (preen \|\| reply("CLEAR") == 1) {
	177	if (preen)
	178	printf(" (CLEARED)\n");
	179	n_files--;
	180	(void)ckinode(dp, idesc);
	181	zapino(dp);
	182	statemap[idesc->id_number] = USTATE;
	183	inodirty();
7026cd3f KM	184	}
	185	}
	186
3ad2f081 KM	187	findname(idesc)
	188	struct inodesc *idesc;
	189	{
	190	register DIRECT *dirp = idesc->id_dirp;
	191
	192	if (dirp->d_ino != idesc->id_parent)
	193	return (KEEPON);
	194	bcopy(dirp->d_name, idesc->id_name, dirp->d_namlen + 1);
	195	return (STOP);
	196	}
	197
7026cd3f KM	198	findino(idesc)
	199	struct inodesc *idesc;
	200	{
	201	register DIRECT *dirp = idesc->id_dirp;
	202
	203	if (dirp->d_ino == 0)
	204	return (KEEPON);
3ad2f081 KM	205	if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
	206	dirp->d_ino >= ROOTINO && dirp->d_ino <= imax) {
	207	idesc->id_parent = dirp->d_ino;
7026cd3f KM	208	return (STOP);
	209	}
	210	return (KEEPON);
	211	}
	212
	213	pinode(ino)
	214	ino_t ino;
	215	{
	216	register DINODE *dp;
	217	register char *p;
1ccd95ec	218	struct passwd *pw;
7026cd3f KM	219	char *ctime();
	220
	221	printf(" I=%u ", ino);
39c18287	222	if (ino < ROOTINO \|\| ino > imax)
7026cd3f	223	return;
39c18287	224	dp = ginode(ino);
7026cd3f	225	printf(" OWNER=");
1ccd95ec KM	226	if ((pw = getpwuid((int)dp->di_uid)) != 0)
	227	printf("%s ", pw->pw_name);
	228	else
7026cd3f	229	printf("%d ", dp->di_uid);
7026cd3f KM	230	printf("MODE=%o\n", dp->di_mode);
	231	if (preen)
	232	printf("%s: ", devname);
	233	printf("SIZE=%ld ", dp->di_size);
	234	p = ctime(&dp->di_mtime);
	235	printf("MTIME=%12.12s %4.4s ", p+4, p+20);
	236	}
	237
	238	blkerr(ino, s, blk)
	239	ino_t ino;
	240	char *s;
	241	daddr_t blk;
	242	{
	243
	244	pfatal("%ld %s I=%u", blk, s, ino);
	245	printf("\n");
993a756c KM	246	switch (statemap[ino]) {
	247
	248	case FSTATE:
	249	statemap[ino] = FCLEAR;
	250	return;
	251
	252	case DSTATE:
	253	statemap[ino] = DCLEAR;
	254	return;
	255
	256	case FCLEAR:
	257	case DCLEAR:
	258	return;
	259
	260	default:
	261	errexit("BAD STATE %d TO BLKERR", statemap[ino]);
	262	/* NOTREACHED */
	263	}
7026cd3f	264	}
ebd05fde KM	265
	266	/*
	267	* allocate an unused inode
	268	*/
	269	ino_t
	270	allocino(request, type)
	271	ino_t request;
	272	int type;
	273	{
	274	register ino_t ino;
	275	register DINODE *dp;
	276
	277	if (request == 0)
	278	request = ROOTINO;
	279	else if (statemap[request] != USTATE)
	280	return (0);
	281	for (ino = request; ino < imax; ino++)
	282	if (statemap[ino] == USTATE)
	283	break;
	284	if (ino == imax)
	285	return (0);
	286	switch (type & IFMT) {
	287	case IFDIR:
	288	statemap[ino] = DSTATE;
	289	break;
	290	case IFREG:
	291	case IFLNK:
	292	statemap[ino] = FSTATE;
	293	break;
	294	default:
	295	return (0);
	296	}
	297	dp = ginode(ino);
	298	dp->di_db[0] = allocblk(1);
	299	if (dp->di_db[0] == 0) {
	300	statemap[ino] = USTATE;
	301	return (0);
	302	}
	303	dp->di_mode = type;
	304	time(&dp->di_atime);
	305	dp->di_mtime = dp->di_ctime = dp->di_atime;
	306	dp->di_size = sblock.fs_fsize;
	307	dp->di_blocks = btodb(sblock.fs_fsize);
	308	n_files++;
	309	inodirty();
	310	return (ino);
	311	}
	312
	313	/*
	314	* deallocate an inode
	315	*/
	316	freeino(ino)
	317	ino_t ino;
	318	{
	319	struct inodesc idesc;
	320	extern int pass4check();
	321	DINODE *dp;
	322
	323	bzero((char *)&idesc, sizeof(struct inodesc));
	324	idesc.id_type = ADDR;
	325	idesc.id_func = pass4check;
	326	idesc.id_number = ino;
	327	dp = ginode(ino);
	328	(void)ckinode(dp, &idesc);
329	zapino(dp);
330	inodirty();
331	statemap[ino] = USTATE;
332	n_files--;
333	}